Quack-grass digger.



H. N. HANSON, QUAGK GRASS BIGGER.

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Patented Aug. 30, 1910.

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QUAGK GRASS BIGGER.

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Patented Aug. 30, 1910.

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HANS NISSON HANSON, OF HENRY, SOUTH DAKOTA.

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QUACK-GRASS BIGGER.

Specification of Letters Patent.

Patented Aug. 30, 1910.

Application filed March 5, 1910. Serial No. 547,432.

To all whom it may concern:

Be it known that I, HANS NISSON HAN- SON, a citizen of the UnitedStates, residing at Henry, in the county of Godington and State of SouthDakota, have invented certain new and useful Improvements in Quack-GrassDiggers; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention has for its object to provide an improved quack grassdigger and cultivator and which device is especially adapted for diggingquack grass.

To the above ends, the invention consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.T

In the accompanying drawings which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a plan view of the improvedmachine, with some parts broken away. Fig. 2 is a side elevation of thesame; Fig. 3 is a detail view of a portion of the improved machine withthe parts thereof in a different position from that shown in Fig. 2;Fig. l is a view in front elevation of one of the teethsecured to aportion of one of the rock shafts; and Fig. 5 is a side elevation of theparts shown in Fig. 4.

The frame of the machine is, as shown, preferably constructed of a pairof side bars 1 and an intermediate bar 2. The forward converging ends ofthe bars 1 are rigidly secured by rivets 3 to the forward end of theintermediate bar 2. At the extreme forward end of the bar 2 is secured aclevis 4 to which draft animals may be hitched.

The forward portion of the frame is supported by means of a caster wheel5 journaled between the prongs of a bifurcated bracket 6 and whichbracket, in turn, is swiveled to a bearing block 7 secured to the frameby means of the rivets 3.

The rear portion of the frame is supported by means of a pair of truckwheels 8 journaled on the crank ends of a crank axle 9. The crank axle 9is mounted in suitable bearings 10 secured to the upper surface of thesidebars 1, by means of U-bolts 1.1 and clamping bars 11*. On each sideof the crank axle 9 is mounted, in the frame, a

square rock shaft 12. The ends and intermediate portions of the rockshafts 12 are reduced, made round and journaled in bearings 1 and 2,respectively, formed by expanding the side bars 1 and 2. The bearings 2of the bar 2 have their upper halves made removable so as to permitremoval of the crank shafts 12. Lock pins 13 are passed through holes inthe projecting ends of the rock shafts 12, outside of the bars 1, toprevent the rock shafts 12 from becoming accidentally separated from theside bars 1. As is evident, any number of these rock shafts 12 may beprovided, and each thereof is provided with a series of laterally spaceddepending teeth 14 having forwardly curved lower sharp ends.

By reference to Fig. 1, it will be noted that the teeth of one of therock shafts 12 are staggered with respect to the teeth of the other.Each tooth 14: is secured to its rock shaft 12 by means of a verticallyand horizontally notched block 15 interposed between the tooth 14 androck shaft 12. The vertical notch of the block 15 is adapted to receivethe upper end of the tooth 14.- and the horizontal notch of the block 15is adapted to receive the rock shaft 12, thus rigidly securing the tooth141: against lateral movement. U-bolts 16 are passed around the tooth 11and block 15 and are secured to the rock shaft 12 by means of clampingbars 17.

To the intermediate portion of each rock shaft 12 is secured a laterallyprojecting arm 18 and the free ends of which arms are pivotallyconnected, one to the other, by means of a link 19. The crank axle 9 isalso provided with a laterally projecting arm 20 which, at its free end,is bifurcated to receive a laterally projecting headed stud 21 securedto one side of the-link 19. An operating latch lever 22 isintermediately pivoted to the bar 2 between the crank axle 9 and therear rock shaft 12 and a lock segment is also secured to the bar 2 forcooperation with the latch lever 22. The lower end of the lever 22 ispivotally connected to the pivotal connection between the arm 18 of theforward rock shaft 12 and the link 19 by means of a crank rod 23.

The operation of the machine may be briefly stated as follows: As isevident, by operating the lever 22, the rear portion of the frame may beraised or lowered and, simultaneously with this movement, the rockshafts 12 are rotated and the teeth let moved either from an operativeor an inoperative position. This arrangement is highly important whenthe machine is used as a quack grass digger. \Vhen the machine is in anoperative position, the teeth are turned into the ground and the framelowered as shown in Fig. 3. As the quack grass is dug or pulled from theground by the teeth 14:, the gathered grass will be carried forward bythe teeth 14 under the advance movement of the machine. The gatheredgrass may be released from the teeth 1%, at will, by pulling the leverbackward, as shown in Fig. 2, which operation simultaneously raises therear end of the machine and throws the teeth into a position so as topointbackward, thus permitting the teeth 14 to be pulled from thegathered grass under the advance movement of the machine. It is alsoevident that, by sin'iultaneously raising the machine frame and throwingthe teeth lt backward, a much smaller movement of the teeth is requiredto release the gathered grass or for forcing the teeth into the groundor removing the same therefrom than would otherwise be required.

The above described device, while very simple and of comparative smallcost, is thought to be highly efficient for the purposes had in view.

What I claim is:

1. In a machine of the kind described, the combination with a frame, ofa crank axle mounted on said frame and having a projecting arm, truckwheels journaled on said crank axle, said truck wheels arranged toengage the ground at all times, a rock shaft mounted on said frame andhaving a projecting arm, a link connecting said two arms, laterallyspaced teeth having forwardly curved lower ends secured to said rockshafts, an operating lever pivotally mounted on said frame, and a crankrod connecting said lever and said link, substantially as described.

2. In a machine of the kind described, the combination with a frame, ofa crank axle mounted on said frame and having a projecting arm, truckwheels journaled on said crank axle, said truck wheels arranged toengage the ground at all times, a multiplicity of laterally spaced rockshafts mounted 011 said frame and each thereof having a projecting arm,a link pivotally connecting all of said arms, laterally spaced teethhaving forwardly curved lower ends secured to said rock shafts, a leverpivotally mounted on said frame, a cooperating latch segment, and acrank rod connecting said lever and said link. substantially asdescribed.

In testimony whereof I ai'lix my signature in presence of two witnesses.

HANS NISSON HANSON.

Vitnesses H. H. PARLIAMENT, E. J. GUNTHER.

